I am trying to decide whether to have radiation or skip it for my stage 1 HER+ BC. I was offered accelerated partial breast radiation which wouldn't be every other day for 5 days. If I don't do radiation and just take Anastrazole for 5 years my risk of recurrence over 10 years is 5.3%. With radiation and Anastrazole it is 1.6%. I'm 71 and had a lumpectomy 1.5cm tumor negative lymph node. Did you have any side effects? Fatigue or burns? Change in size or shape of the breast? I'm very worried about side effects and not sure if the benefits outweigh the risks given my low risk of recurrence. But also worried about not doing everything to reduce my risk.